Consider the following statements associated with the basic electrostatic properties of ideal conductors : 

1. The resultant field inside is zero. 2. The net charge density in the interior is zero. 3. Any net charges reside on the surface. 4. The surface is always equipotential. 5. The field just outside is zero. 

Which of the above statements are correct ? 

(a) 1, 2, 3 and 4 (b) 3, 4 and 5 only (c) 1, 2 and 3 only (d) 2 and 3 only

1 Answer

Answer :

Consider the following statements associated with the basic electrostatic properties of ideal conductors : 1. The resultant field inside is zero. 2. The net charge density in the interior is zero. 3. Any net charges reside on the surface. 4. The surface is always equipotential. 5. The field just outside is zero. 


Which of the above statements are correct ? 


(a) 1, 2, 3 and 4 (b) 3, 4 and 5 only (c) 1, 2 and 3 only (d) 2 and 3 only

Related questions

Description : Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at ... the surface C) The conductor surface is an equivalent potential surface D) None of the above

Last Answer : Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at ... the surface C) The conductor surface is an equivalent potential surface D) None of the above

Description : Consider the following statements : Any element connected in  1. Series with an ideal current source is redundant. 2. Parallel with an ideal current source is redundant. 3. Series with an ideal voltage ... with an ideal voltage source is redundant.  Which of the above statements is/are correct ?

Last Answer : Series with an ideal current source is redundant. and Parallel with an ideal voltage source is redundant. 

Description : A current carrying conductor is associated with – (1) a magnetic field (2) an electric field (3) an electro-magnetic field (4) an electrostatic field

Last Answer : (3) an electro-magnetic field Explanation: A current carrying conductor, such as a metal wire, will produce a magnetic field around it because of the motion of charge within the wire itself. This motion produces or sets up a magnetic field around the wire in the form of concentric circles.

Description : A current carrying conductor is associated with (1) a magnetic field (2) an electric field (3) an electro-magnetic field (4) an electrostatic field

Last Answer : an electro-magnetic field

Description : Consider the following statements: 1. Alluvial soil is rich in chemical properties and is capable of yielding Rabi and Kharif crops. 2. Black soil is suitable for cotton, groundnut. 3. Rabi crops are reaped in autumn after sowing in June. ... ] (a) 1, 2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3

Last Answer : Ans: (b)

Description : State four properties of Ideal transformer:

Last Answer : Properties of Ideal transformer: 1) No losses (iron and copper), hence no temperature rise 2) Zero winding resistance and leakage reactance 3) No voltage drop i.e. E1 = V1, ... R losses]   4) Zero magnetic leakage (coefficient of coupling between primary and secondary windings is unity).

Description : Emulsifier protection is associated with: a) Grounding protection b) Dielectric strength protection of cables and conductors c) Lightning protection d) Fire protection

Last Answer : Ans: D

Description : Hall effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D) Solders.

Last Answer : (B) Semiconductors.

Description : Consider the following statements associated with the germination of an angiospermous seed: (1) As the seed gets hydrated and germinates, enzymatic activity is increased (2) The respiration ... The increase in the respiratory rate continues till senescence (4) Rate of enzymatic activity decreases

Last Answer : Ans. ((b))

Description : Consider the following statements for priority queue: S1: It is a data structure in which the intrinsic ordering of the elements does determine the result of its basic operations. S2: The elements of a priority queue ... . (C) SI is incorrect and S2 is correct. (D) Both S1 and S2 are correct.

Last Answer : (D) Both S1 and S2 are correct.

Description : Energy stored in electrostatic field of capacitance formula

Last Answer : Energy stored in electrostatic field of capacitance formula

Description : Electrostatic voltmeters are particularly suitable for measuring high voltages because the construction is simplified due to

Last Answer : Electrostatic voltmeters are particularly suitable for measuring high voltages because the construction is simplified due to Large electrostatic forces.

Description : Voltage applied across a ceramic dielectric produces an electrostatic field 100 times greater than in air. The dielectric constant? of the ceramic equals________. 

Last Answer : Voltage applied across a ceramic dielectric produces an electrostatic field 100 times greater than in air. The dielectric constant? of the ceramic equals 100.

Description : What are the properties of ideal transformer?

Last Answer : 1.There should be no losses 2.The winding should have zero resistance 3.The leakage flux should be zero 4. The permeability of core should be so high that the negligible current is required to establish the flux in it.

Description : Ideal refrigeration cycle is (A) Same as Carnot cycle (B) Same as reverse Carnot cycle (C) Dependent on the refrigerant's properties (D) The least efficient of all refrigeration processes

Last Answer : (B) Same as reverse Carnot cycle

Description : State the properties of an ideal varnish. 

Last Answer : 1. It should render the surface glossy. 2. It should dry rapidly / quickly. 3. It should form hard, durable, flexible film on painted surface. 4. It should not be affected by atmospheric action. 5. It should stick easily to surface. 6. It should not shrink / cracks after drying. 

Description : State any four properties of Ideal transformer.

Last Answer : Properties of Ideal transformer: 1) No losses (iron and copper losses), hence no temperature rise. 2) No magnetic leakage i.e (Coefficient of coupling between primary and secondary windings is unity) 3) Zero winding ... drop i.e. E1 = V1, E2 = V2 5) Efficiency 100 %. 6) Regulation 0 %.

Description : advantage and disadvantages of stranded conductors. 

Last Answer : Advantage and disadvantages of stranded conductors  Advantages of Stranded Conductors:-  1. Conductor becomes flexible.  2. Its weight reduces.  3. Easy for handling.  4. Easy to ... Stranded Conductors:-  1. Due to stranding of conductor its resistance increases slightly about 2%. 

Description : Which have more free electrons: conductors or insulators? 

Last Answer : Conductors have many free electrons whereas insulators have very few or none at all.

Description : Name two good conductors, two good insulators, and two semiconductors.

Last Answer : In general all metals are good conductors, with silver the best and copper second.

Description : Two parallel conductors are separated by a distance, d carrying a current, I in the same direction. The magnetic field along a line running parallel to the conductors and midway between them is (A) zero (B) proportional to I (C) proportional to d (D) proportional to the permeability of the medium. 

Last Answer : The  magnetic  field  along  the conductor at  the  midway point  is  zero  because  equal  magnitide  of  field  are produced  in  each conductor   therefore  the  resultant  magnetic field  at  the  midway  is  zero.

Description : Bundled conductors are mainly used in high voltage overhead transmission lines to (a) Reduce line loss (c) Reduce corona (b) Reduce harmonics (d) Increase strength

Last Answer : Bundled conductors are mainly used in high voltage overhead transmission lines to Reduce corona 

Description : Hollow conductors are used in the transmission lines to:  (1) Improve heat dissipation (2) Reduce corona loss (3) Reduce skin effect (4) Reduce the line inductance

Last Answer : Hollow conductors are used in the transmission lines to: Reduce corona loss.

Last Answer : Copper conductors are generally used for transmission lines because it has longer life and high conductivity.

Last Answer : The number of conductors of the compensating winding in a D.C. machine is always less than the number of armature conductors per pole.

Description : Two aluminium conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 100 ohms the resistance of other conductor will be 

Last Answer : Two aluminium conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 100 ohms the resistance of other conductor will be 25 ohms.

Description : Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is (A) R ln 2 (B) -R ln 2 (C) 3 R ln 2 (D) -3R ln 2

Last Answer : (A) R ln 2

Description : All elements of the marketing mix are influenced by physical distribution functions. For this reason, it is important for marketers to remember that A)physical distribution decisions must be made ... expenditures. D)no single distribution system is ideal for all situations and target markets.

Last Answer : D)no single distribution system is ideal for all situations and target markets.

Description : What is your ideal basic T-shirt?

Last Answer : Hane’s, Beefy T. Basic, inexpensive, durable and they have nothing to say. They’re all ‘do’.

Description : Maximum number of passenger cars that can pass a given point on a road during one hour under the most ideal road way and traffic conditions, is known as (A) Traffic density (B) Basic capacity of traffic lane (C) Possible capacity of traffic lane (D) All the above

Last Answer : Answer: Option B

Description : A basic ideal of a democratic society is Options: A) Powerful leadership B) Belief in the opinions of the leaders C) Respect for the enlightened individual D) Might makes right' 

Last Answer : C) Respect for the enlightened individual 

Description : Consider the following statements with respect to a high Q, series RLC circuit under resonance 1. The voltage across R is equal to the applied voltage 2. The voltage across L and C are zero 3 ... in magnitude 4. The voltage accross L and C are maximum Which of these statements are correct?

Last Answer : Consider the following statements with respect to a high Q, series RLC circuit under resonance 1. The voltage across R is equal to the applied voltage 2. The voltage across L and C are zero 3. ... The voltage accross L and C are maximum Which of these statements are correct? 1,3 and 4

Description : Consider the following statements:  1. A grid connected induction generator always supplies leading reactive power to the bus  2. An overexcited synchronous motor draws current at a lagging power factor  3. An underexcited synchronous ... (c) 1, 3 and 4 are correct (d) 1, 2, 3 and 4 are correct 

Last Answer : Consider the following statements:  1. A grid connected induction generator always supplies leading reactive power to the bus  2. An overexcited synchronous motor draws current at a lagging power factor  3. An underexcited ... correct (c) 1, 3 and 4 are correct (d) 1, 2, 3 and 4 are correct 

Description : Consider the following statements : 1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage. 2. In the full bridge converter, the voltage across ... bridge converter is half the maximum dc link voltage. Which of the above statements are correct ?

Last Answer : Consider the following statements : 1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage. 2. In the full bridge converter, the voltage across the primary of ... dc link voltage. Which of the above statements are correct ? 1 and 2 only

Description : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are ... vertically oriented structure supports large blocking voltages. Which of the above statements is/are correct ?

Last Answer : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are less due to ... large blocking voltages. Which of the above statements is/are correct ? 2 only

Description : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of the ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Description : Consider the following statements regarding corona :  1. It causes radio interference.  2. It attenuates lightning surges.  3. It causes power loss.  4. It is more prevalent in the middle conductor of a transmission line employing ... only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 3 and 4 only

Last Answer : Consider the following statements regarding corona :  1. It causes radio interference.  2. It attenuates lightning surges.  3. It causes power loss.  4. It is more prevalent in the middle conductor of a transmission ... 3 only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 3 and 4 only

Description : Consider the following statements :  1. Salient pole alternators have small diameters and large axial lengths.  2. Cylindrical rotor alternators have a distributed winding.  3. Cylindrical rotor alternators are wound for large number ... 3 only (b) 2 and 4 only (c) 1 and 4 only (d) 2 and 3 only

Last Answer : Consider the following statements :  1. Salient pole alternators have small diameters and large axial lengths.  2. Cylindrical rotor alternators have a distributed winding.  3. Cylindrical rotor alternators are wound for ... 3 only (b) 2 and 4 only (c) 1 and 4 only (d) 2 and 3 only

Description : Consider the following statements regarding capability curves of a synchronous generator :  1. The MVA loading should not exceed the generator rating.  2. The field current should not be allowed to exceed a ... 4. The load angle must be more than 90°.  Which of the above statements are correct ?

Last Answer : Consider the following statements regarding capability curves of a synchronous generator :  1. The MVA loading should not exceed the generator rating.  2. The field current should not be allowed to exceed a ... .  Which of the above statements are correct ? 1, 2 and 3 only

Description : Consider the following statements regarding three-phase transformers in Open -Delta (V -V) connections :  1. Being a temporary remedy when one transformer forms of Delta -Delta system is &imaged, and removed from service.  ... and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements regarding three-phase transformers in Open -Delta (V -V) connections :  1. Being a temporary remedy when one transformer forms of Delta -Delta system is &imaged, and removed from service.  ... and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Description : Consider the following statements with respect to Discrete Fourier Transform (DFT) : 1. It is obtained by performing a sampling operation in the time domain. 2. It transforms a finite duration sequence into a discrete frequency spectrum. 3 ... (a) 1 and 2 only (b) 2 and 3 only (c) 1 only (d) 3 only

Last Answer : Consider the following statements with respect to Discrete Fourier Transform (DFT) : 1. It is obtained by performing a sampling operation in the time domain. 2. It transforms a finite duration sequence into a discrete frequency spectrum. ... (a) 1 and 2 only (b) 2 and 3 only (c) 1 only (d) 3 only

Description : Consider the following statements with regard to induction type wattmeter :  1. Can be used on both ac and dc systems.  2. Power consumption is relatively low.  3. It is accurate only at stated frequency and temperature.  Which ... /are correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to induction type wattmeter :  1. Can be used on both ac and dc systems.  2. Power consumption is relatively low.  3. It is accurate only at stated frequency and temperature. ... correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Description : Consider the following statements with regard to Moving Iron (MI) instruments :  1. These instruments possess high operating torque.  2. These instruments can be used in ac and dc circuits.  3. Power consumption in these instruments ... and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to Moving Iron (MI) instruments :  1. These instruments possess high operating torque.  2. These instruments can be used in ac and dc circuits.  3. Power consumption in these ... 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Description : Consider the following statements regarding Peer -to -Peer computing environment :  1. In this system, clients and servers are not distinguished from one another.  2. All nodes distributed throughout the ... just a replica of the file -server system.  Which of the above statements are correct ?

Last Answer : Consider the following statements regarding Peer -to -Peer computing environment :  1. In this system, clients and servers are not distinguished from one another.  2. All nodes distributed throughout the system ( ... .  Which of the above statements are correct ? 1, 2 and 3 only

Description : Consider the following statements with regard to Lissajous pattern on a CRO :  1. It is a stationary pattern on the CRO.  2. It is used for precise measurement of frequency of a voltage signal.  3. The ratio between frequencies ... /are correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to Lissajous pattern on a CRO :  1. It is a stationary pattern on the CRO.  2. It is used for precise measurement of frequency of a voltage signal.  3. The ratio between ... /are correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Description : Consider the following statements :  1. Network theorems are not derivable from Kirchhoff's law.  2. To get the . Norton current, one has to short the current source.  3. Thevenin's theorem is suitable for a circuit involving ... /are correct ?  (a) 1, 2 and 3 (b) 1 only (c) 2 only (d) 3 only

Last Answer : Consider the following statements :  1. Network theorems are not derivable from Kirchhoff's law.  2. To get the . Norton current, one has to short the current source.  3. Thevenin's theorem is suitable for a circuit ... /are correct ?  (a) 1, 2 and 3 (b) 1 only (c) 2 only (d) 3 only

Description : Consider the following statements : If a high Q parallel resonant circuit is loaded with a resistance  1. The circuit impedance reduces.  2. The resonant frequency remains the same.  3. The bandwidth reduces.  Which of the above statements is/are correct ?

Last Answer : 1

Description : Consider the following statements :  1. Superconductors exhibit normal conductivity behaviour above a transition temperature Tc.  2. Superconductors lose their superconducting nature in an external magnetic field, provided the external magnetic ... b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements :  1. Superconductors exhibit normal conductivity behaviour above a transition temperature Tc.  2. Superconductors lose their superconducting nature in an external magnetic field, provided the external ... (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Description : Consider following properties of the noble gases. I. They readily form compounds which are colourless. II: They generally do not form ionic compounds.

Last Answer : Consider following properties of the noble gases. I. They readily form compounds which are colourless. II: They ... IV C. I,III,IV D. (D) All